SU762103A1 - Single-phase single-machine inverter - Google Patents

Description

The invention relates to single-phase single-machine frequency converters.

Single-machine frequency converters are known, which contain a combined winding made in the form of four to five shoulder axles [H].

These converters have a limited scope.

In addition, single-phase frequency converters are known that contain generator K and motor windings located in a common magnetic system [2].

They require a separate start winding, which complicates the design, '15

reduces the use of active materials.

The purpose of the invention is to simplify the design by eliminating a separate starting winding. 20

This goal is achieved by the fact that the generator stator winding is made.

.of single-phase winding triple electrical combination on P, P, R.

The number of pairs of poles. ⁴ * 25

The winding of the triple combination of the stator consists of coils or coil

groups connected in four four-.

shoulders, each having two independent single-phase outputs each

2

the course along the bridge diagonal is Ρ ₂ , P ^ the number of pole pairs at one output and P ^ the number of pole pairs at the other output connected in working mode by the ends of the same output with P ₂ ,

Ra, the number of pairs of poles through. Switching contacts in a closed circuit; having independent single-phase output along the 'Tsy ^ GHbCHO ^'Yod'n'b''na"P ₂ and" P ₃ . the number of pairs of poles from the output ends of inter-bridge connections, fed through the terminals of the output to P ^, the number of pairs of poles from rectifiers connected to the motor single-phase stator winding with P ^ the number of pairs of poles.

The winding of the triple alignment of the stator is shifted in space along the circumference of the armature relative to the motor winding by 90 el. hail.

In the starting mode, the bridges are connected in series with the help of switching contacts of the ends of the same output on P * the number of pairs of poles in an open circuit connected by free ends to the terminals of the motor winding.

In order to further simplify the design. The winding of the rotor is made according to the block diagram of the winding of the triple stator alignment and consists of four 762,103

PEX chetyrehplechih bridges having individually two-phase exit diagonally bridges on F _and E * number of pole pairs on a single output, and 'to ζ, the number of pairs of poles on another output connected to the ends of similar outputs, P ₃ numbers of pole pairs in closed circuit having independent single-phase outputs along the circuit. alternately on P ₂ and. P is the number of pairs of poles from the output ends of inter-bridge connections, the outputs of the bridges on P ^ are the number of pairs of poles shorted, forming four short-circuited circuits, and the outputs of the circuit on P _{2 the} number of pairs of poles are connected by the clamps of the output of the circuit on P _{e the} number of pairs of poles through rectifiers . '

FIG. 1 shows a diagram of a pre-lag converter; in fig. 2 shows a schematic set of magnetic fields combined in a single magnetic core and the arrangement of the coils along the sweep of the armature; in fig. 3 block diagram of single-phase winding triple alignment with three independent single-phase 'outputs; in fig. 4 is a diagram of a working single-phase motor winding with the number of poles Gr., = 2 with the number of grooves per pole and. phase ς = 12 laid in slot 24; in fig. 5 shows the arrangement of the coil groups of the winding of a triple electrical combination, laid in the same grooves as the motor winding; on fig. 6 - the arrangement of the coils of the rotor winding triple electrical combination, laid in 8 slots.

The Converter consists of a stator 1, a rotor 2, switching contacts 3-10, rectifier blocks 11 and 12, regulating the resistance 13.

The stator consists of an input motor winding 14 with the number of pairs of poles P | = 1, fed by frequency C = 50 Hz, winding 15 of triple alignment, consisting of coils forming chetyrehplechy bridges А ^,, Г, connected in the operating mode with each other. Across terminals 16 and 17, 18 and 19, 20 and 21, 22 and 23 using contacts 3-6 in a closed chain, and in the start-up mode, connected by terminals .24 and 25, 26

and 27, 28 and 29, 30 and 31 using contacts 7, 8, 9 in an open circuit with the formation of free terminals 24 and 3X, connected during the start-up period to terminals 32 and 33 of the motor winding

14.

The clamps 19 and 23 of the winding 15 through the rectifier unit 11, regulating the resistance 13 and the contact 10 from the terminals 32 and 33 is applied rectified voltage.

Winding 15 at terminals 24 and 25, 26 and 27, 28 and 29, '30 and 31 forms a single-phase input to P ₄ = 1 the number of pairs of poles and performs the function of a starting winding for the start-up period, along terminals 19

, and 23 forms a single-phase input on P ^ = 4 the number of pole pairs and performs the functions of an excitation winding, clamps 17 and 22, 18 and 21 forms a single-phase output on P ₂ = 2 the number of pole pairs and performs the function of a generator winding. Resistance 13 is used to control the excitation current of the magnetic field with the number of pole pairs P ₃ = 4.

On the rotor 2 there is a triple alignment winding 34, consisting of coils connected in four-arm axles А ^, B ^, В ^, Г ₂ , connected in a closed chain. Clips 35 and 36,

37 and 38, 39 and 40, 41 and 42 form a single-phase output at P = 1, the number of pairs of poles and short-circuited, forming four short-circuited circuits that perform the function of a short-circuited winding.

The winding 34 at terminals 43 and 44 forms a single-phase output at P = 4 the number of pairs of poles and performs the function of a generator winding feeding through rectifiers 12 clamps 45 and 46, and through clamps 45 and 46 forms a single-phase input at P _g = 2 the number of pairs of poles and performs the function of the excitation winding.

The windings of the triple combination of the stator and the rotor are made, as an example, of coils 47-50 connected in a block diagram in the form of a chain of series-connected, four-shouldered bridges А ^, Б ^, В ₃ , (see Fig. 3), Coils, having different depths in the grooves and laid in the same and the same grooves, are denoted by the same numbers. The solid arrows show the currents that create the field with the number of pole pairs P ^ = 1, the dashed arrows indicate the currents creating the field with the number of pole pairs P ₂ = 2, the point with the dashed arrows show the currents that create the magnetic field with the number of pole pairs P ₃ = 4 . To simplify the nature of the distribution of induction of magnetic fields with the numbers of pairs of poles P ^, P _£ , P ^ each individually is presented in FIG. 2

When powering windings 14 and 15 with a switched frequency current = 50 Hz with open contacts 3-6 and 10 and closed contacts "7-9, a magnetic field is generated with respect to the stator" with the number of pole pairs D = 1, leading to EMF and currents in short-circuited rotor winding. Thereby, the converter is started up to speed

. where $ 4 is the slip of the rotor relative to the rotating field P ^ = 1 ·

After starting and opening contacts

7-9 converter works like a normal single-phase asynchronous motor.

After disconnecting the winding 15 from the network, contacts 3-6 and 10 are included.

762103

the most applied is the rectified voltage on the clamps 19 and 23. The stator winding 15 thus flows around a rectified current that excites a magnetic field that is stationary relative to the stator with the number of pole pairs P ₃ = 4, causing a EMF frequency of ⁵ T in the rotor winding

EMF frequency ^ "'200 Hz from the terminals 43 and 44 of the winding 34 of the rotor is fed through the rectifier 12 to the terminals 45 and 46 of the winding 34.

Under the action of a rectified EMF frequency C, a rectified current will flow through the rotor winding, causing a magnetic field that is stationary relative to the rotor with a number of pole pairs P ^ = 2, which induces a frequency emf of 20 in the winding

r ^P ^ p Ha * bo ·

The emf of the frequency ΙΟΟ ^ -χΙΟΟ Hz is separated from the clamps 17 and 2 2 windings. 15. Thus, 25 currents in the stator winding 15 under load, direct current and alternating current of frequency ί ₂ % 100 Hz flow, and currents of frequency 5 _< flow through the rotor winding _; Τ ₃ ~ 200 Hz and DC.

The use of the converter in comparison with the known will allow to simplify the design, to improve the use of active materials, to increase the reliability of the converter. 35

Claims (2)

Claim 1. Single-phase single-machine frequency converter with motor 40 and generator stator windings located in a common magnetic system with switching contacts and rectifiers and rotor winding, which, in order to simplify the design by eliminating a separate start winding, the stator generator winding consists of coils connected in four four-split bridges, each having two independent single-phase outputs πό to the diagonals of the bridges by ζ, the number of pairs of polarities on one output and on P ₂ , Pz the number of pairs of poles and another output connected by the ends of the same outputs with P ^, P _{and the} number of pairs of poles through the switching contacts in a closed circuit having independent single-phase outputs along the circuit alternately on Р _г , P _a number of pairs of poles from the output ends of meierosth connections, fed through the output clamps on P ^ the number of pairs of poles and rectifiers from the input terminals of the stator motor winding to P ^ the number of pairs of poles shifted in space around the stator circumference by 90 el. quadruple bridges are connected in series with outputs on P, the number of pairs of poles through switching contacts in a circuit connected by two free clamps to the terminals of the motor winding. 2. Converter π. 1, the fact that the rotor winding consists of four four-shoulder bridges, each having two independent single-phase outputs along the diagonals of bridges on P ^ the number of pole pairs at one outlet and P ₂ , P _{3 the} number of pole pairs at the other output, connected ends of similar outputs P ^, P _e numbers of pairs of poles''in the closed circuit having an independent single phase outputs alternately along the chain by P ^, P ₃ the number of pole pairs of the outlet ends m'ezhmostovyh compounds wherein the bridge outputs to' P ^ the number of pairs of poles is short-circuited, and the terminals of the output of the circuit on P _{2 the} number of pairs of poles are connected by the clamps of the output of the circuit to P the number of pairs of poles through the fuses